I am. I took the Metallurgy exam in Oct 07. You are right, there is not much study material out there. Get the TMS practice questions, the topic list, and the recommended reference book list. Then do the practice exam (it is horrible and contains errors) to find out where you are strong and weak.
After that, you are on your own. I just studied (read) the reference recommended reference books. I also decided early on that I was not going to relearn the thermodynamic stuff, so I did not study that and decided to take the 6% hit.
I thought the test was difficult, but straight forward. Some gimme's and some huh? The rest were workable.